About
妹 is a phono-semantic compound: 女 on the left gives the meaning category of a female relative, and 未 on the right provides the sound. 未 originally depicted a tree with new branches, meaning "not yet" or "incomplete", which suits the core sense of a younger sister, a sibling who is not yet fully grown or younger than oneself. The character has consistently referred to a younger sister or female cousin of the same generation, and its structure remains identical in both traditional and simplified script.
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Example Sentences Hide
我的妹妹很可爱。
妹妹喜欢唱歌。
我和妹妹去公园。
妹妹的学校很近。
我教妹妹做作业。
妹妹虽然小，但很懂事。
妈妈给妹妹买了一件新衣服。
每当妹妹难过时，我都会安慰她。
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